Irregular shaped lesion found on right axillan, advice needed

Good day everyone,

My sis(age 39) went for the Ultrasonic test last week and below is the report, I truly appreciate if any kind soul can explain or interprete it to us in layman terms, and most importantly how high the chances are for the lesion to be malign. She will go for biospy soonest but we would like to find out whta the chances are, its going to be a painful time while waiting for the result.

quote:

In the right axilla, there is a palpable 15 x 13 x 11mm irregular mixed hypoechoic and isoechoic lesion, with suggestion of hyperechoic rims, with no evidence of vascularity. There is mild posterior acoustic shadowing.

No suspicious finding in the right breast and other areas. Birad :4

Unquote.

Thanks.

Morel (Singapore)